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OPNEM-1 Ultrasonic Pulser Key Benefits
OPNEM-1 is a high energy ultrasonic pulser capable of
driving EMAT’s and other inductive transducers. This device can produce a very short
duration pulses (about 50 ns) with the max. amplitude of 28 A under the load of 2m H.
The pulse length is about 50ns under the load of 2 mH, with larger inductance the
pulse will be longer (measured with the Tektronix probe: Tek P6041 - 1mV/1mA).
This device can be optionally made with the integrated receiver (with amplifier)
and external trigger input. The instrument size can be altered to serve the
particular customer needs. In fact, the pulser in the dimensions of the matchbox can be
made. In addition, pulser has been optimized for EMAT transducers and may not be revised
for other transducer designs.
The device includes: 1.) Pulse transmitter for inductive loads, 2.) Power supply
unit
Features and Specifications
 | External connections:
1. AC power cable (maximum 250V AC, power consumption 5 W)
2. The output (Pulse out) should be connected to a transducer with a
BNC connector cable (to avoid the deterioration of the pulse it should not be longer than
30 cm)
3. Trig out outputs the internal TTL trigger signal (pulse follows on
the falling edge). |
| The power switch is located on the back panel. |
| Fuse (0.5 A) is located on the back panel. |
| Transmitter is triggered by the internal trigger signal. The triggering
frequency is about 1kHz. |
| Amplitude of the pulse can be adjusted with potentiometer Ampl
(max. 28 A - The shape of the pulse is shown on the picture). |
General Information
Instrument Size
The basic pulser design is a stand-alone unit with AC power supply. However, its size can
be revised for the specific customer needs. The entire circuitry can be easily housed in
the matchbox size housing if desired or made in the exact size module which would fit into
the customer measuring instrumentation.
Options
The pulser can be supplied with the integrated receiver unit if so requested. The receiver
could be also designed to meet the specific requirements. Additional amplifier circuitry
could be also accommodated.
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